A team of researchers computes correlation coefficients between family income and the number of words children hear each hour in the home and between family income and the ratio of affirmations to prohibitions that children hear.What sorts of coefficients are the researchers likely to find?
A) They should find a positive correlation between family income and the number of words children hear, but a near-zero correlation between family income and the ratio of affirmations to prohibitions that children hear.
B) They should find a near-zero correlation between family income and the number of words children hear, but a positive correlation between family income and the ratio of affirmations to prohibitions that children hear.
C) They should find near-zero correlations between family income and both the number of words children hear and the ratio of affirmations to prohibitions that they hear.
D) They should find positive correlations between family income and both the number of words children hear and the ratio of affirmations to prohibitions that they hear.

Question

Quizplus · Accepted Answer

Based on previous research, there is a positive correlation between family income and the number of words children hear in the home, as more affluent families tend to have more resources available for language development. Additionally, there is a positive correlation between family income and the ratio of affirmations to prohibitions, as higher-income families tend to have more positive and encouraging communication styles. Therefore, the researchers are most likely to find positive correlations between family income and both the number of words children hear and the ratio of affirmations to prohibitions.

A Team of Researchers Computes Correlation Coefficients Between Family Income